摘要:
The invention provides a dual polarized antenna or antenna array with a first and second radiation pattern having a first and second polarization, a method for adjustment of said antenna or antenna array and a wireless communication system comprising said antenna or antenna array. The antenna or antenna array comprises a main radiating antenna element or array of main radiating antenna elements arranged above a conductive frame. Then invention further provides an antenna or antenna array wherein a combination of conductive parasitic strips and chokes are arranged in association with the main radiating antenna element to achieve means for independently controlling beamwidths of the first and second radiation pattern a method for adjustment to achieve a desired beamwidth for each polarization, wherein the beamwidth adjustment for first and second radiation pattern is made independently of each other a wireless communication system including base stations equipped with a dual polarized antenna or antenna array according to the invention.
摘要:
The invention provides a dual polarized antenna or antenna array with a first and second radiation pattern having a first and second polarization, a method for adjustment of said antenna or antenna array and a wireless communication system comprising said antenna or antenna array. The antenna or antenna array comprises a main radiating antenna element or array of main radiating antenna elements arranged above a conductive frame. Then invention further provides an antenna or antenna array wherein a combination of conductive parasitic strips and chokes are arranged in association with the main radiating antenna element to achieve means for independently controlling beamwidths of the first and second radiation pattern a method for adjustment to achieve a desired beamwidth for each polarization, wherein the beamwidth adjustment for first and second radiation pattern is made independently of each other a wireless communication system including base stations equipped with a dual polarized antenna or antenna array according to the invention.
摘要:
A packaging machine under control of an electronic control system is set forth. The packaging machine includes a plurality of servo driven packaging stations that execute the processes required to fill and seal a carton. Each of the packaging stations is driven by one or more servomotors associated therewith. A plurality of servo amplifiers are connected to the servomotors to control the rotational movement of the servomotors thereby to effect control of the motion of the various components associated with each if the packaging stations. The packaging machine further includes at least two programmable devices connected for communication over a common bus. A programmable axis manager (PAM) is connected to control the plurality of servo amplifiers and, thus, the motion profiles of the servomotors and components of the respective processing station. A programmable logic controller (PLC) is connected to receive and transmit input/output signals associated with the plurality of packaging stations. The PAM and the PLC communicate data variable values over the common bus using predetermined fingerprints assigned to each variable value. Use of the fingerprint/variable value protocol allows high speed communication between the PLC and PAM thereby allowing the PLC and PAM to be viewed as a single control unit.
摘要:
A method and an arrangement for trying out in advance prerequisites for introducing new services in a telecommunications system. A base system is described by a specification language, a new service is described by the specification language as separate supplement to the base system description. The base system description and supplement are linked together to form a description of the total resultant system. The total system is then analysed, for example by a reachability analysis. The invention also relates to an arrangement for carrying out the method. The invention solves the technical problem of identifying problems of an interservice interference type with respect to specific services at an earlier stage.
摘要:
A servomotor control system is set forth that assists in overcoming the problem of servomotor shut down during a failure of the programmable control system and/or servo-amplifier. The presently disclosed servomotor control system includes a programmable control system having one or more output signals connected to control a servo-amplifier. The system further includes a servomotor that is connected for control by the servo-amplifier. A safety switch is connected for detection by the programmable control system, the programmable control system controlling the servo-amplifier to brake the servomotor upon detection of the actuation of the safety switch. A delayed braking apparatus is disposed between the servo-amplifier and the servomotor. The delayed braking mechanism is also connected to detect the actuation of the safety switch, and acts to brake the servomotor after a predetermined time period from the detection of such actuation has lapsed.